package com.uwo.house.kits;

import java.security.MessageDigest;

/**
 * Created by yanhao on 2017/7/22.
 */
public class EncryptKits {

    public static String Md5(String s) {
        char hexDigits[]={'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};
        try {
            byte[] btInput = s.getBytes();
            // 获得MD5摘要算法的 MessageDigest 对象
            MessageDigest mdInst = MessageDigest.getInstance("MD5");
            // 使用指定的字节更新摘要
            mdInst.update(btInput);
            // 获得密文
            byte[] md = mdInst.digest();
            // 把密文转换成十六进制的字符串形式
            int j = md.length;
            char str[] = new char[j * 2];
            int k = 0;
            for (int i = 0; i < j; i++) {
                byte byte0 = md[i];
                str[k++] = hexDigits[byte0 >>> 4 & 0xf];
                str[k++] = hexDigits[byte0 & 0xf];
            }
            return new String(str);
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }

    }


    public static String generatePassword() {
        String[] pa = { "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z", "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O",
                "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z", "`","~","!","@","#","$","%","^","&","*","(",")","-","_","=","+","[","]","{","}","\\","/","?",",",".","<",">"};
        StringBuffer sb = new StringBuffer("");
        for (int i = 0; i < 6; i++) {
            sb.append(pa[(Double.valueOf(Math.random() * pa.length).intValue())]);
        }
//        String[] spe = { "`","~","!","@","#","$","%","^","&","*","(",")","-","_","=","+","[","]","{","}","\\","/","?",",",".","<",">"};
//        sb.append(spe[(Double.valueOf(Math.random() * spe.length).intValue())]);
        return sb.toString();
    }


    public static void main(String[] args){
        System.out.println(EncryptKits.generatePassword());
    }

}
